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(ns aoc-2022.day01)
(require '[clojure.java.io :as io])
(defn split-by [delim acc coll]
(let [head (first coll)
tail (rest coll)]
(if (nil? head)
[acc]
(cond
(= delim head) (cons (reverse acc) (split-by delim [] tail))
:else (split-by delim (cons head acc) tail)))))
(defn task1 [rows]
(->> rows
(map (fn [row] (if (seq row) (Long/valueOf row) "")))
(split-by "" [])
(map (fn [calories] (reduce + calories)))
(reduce max)))
(defn task2 [rows]
(->> rows
(map (fn [row] (if (seq row) (Long/valueOf row) "")))
(split-by "" [])
(map (fn [calories] (reduce + calories)))
sort
reverse
(take 3)
(reduce +)))
(with-open [rdr (io/reader "resources/day01_actual.txt")]
(let [rows (line-seq rdr)]
(println "task1:" (task1 rows))
(println "task2:" (task2 rows))))
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